<template>
  <div class="login-container">
    <el-form
      ref="loginForm"
      :model="loginForm"
      :rules="loginRules"
      class="login-form"
      auto-complete="on"
      label-position="left"
    >

      <div class="title-container">
        <h3 class="title">
          <!-- 有的页面文字可能是图片(logo图) -->
          <img
            src="@/assets/common/login-logo.png"
            alt=""
          >
        </h3>
      </div>

      <el-form-item prop="mobile">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="mobile"
          v-model="loginForm.mobile"
          placeholder="Mobile"
          name="mobile"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="Password"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span
          class="show-pwd"
          @click="showPwd"
        >
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>

      <el-button
        class="login_btn"
        :loading="loading"
        type="primary"
        style="width:100%;margin-bottom:30px;"
        @click.native.prevent="handleLogin"
      >登录</el-button>

      <div class="tips">
        <span style="margin-right:20px;">mobile: 13800000002</span>
        <span> password: 123456</span>
      </div>
    </el-form>
    <!-- <div>
      <button @click.prevent="btnFn">测试</button>
    </div> -->
  </div>
</template>

<script>
import { validMobile } from '@/utils/validate'
// import { loginAPI } from '@/api' // getUserInfoAPI
export default {
  name: 'Login',
  data() {
    const validateMobile = (rule, value, callback) => {
      if (!validMobile(value)) {
        callback(new Error('请输入正确的手机号'))
      } else {
        callback()
      }
    }

    return {
      loginForm: {
        mobile: '13800000002',
        password: '123456'
      },
      loginRules: {
        mobile: [{ required: true, trigger: 'blur', validator: validateMobile }],
        password: [{ required: true, trigger: 'blur', min: 6, max: 12, message: '密码长度在6-12之间' }]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  methods: {
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    // 登录按钮点击事件
    handleLogin() {
      // async写在就近的函数声明的前面
      this.$refs.loginForm.validate(async valid => {
        // 表单校验
        // eslint-disable-next-line no-empty
        if (valid) {
          // 通过->发起登录请求
          // eslint-disable-next-line no-empty
          // await只能提取promise对象成功的状态的值
          // await取代then()函数，await可以把成功的值 提取出来留在原地
          // tyy+catch代码块
          // try放可能会报错的代码
          // 一旦try大括号内代码报错立刻停止try大括号里代码向下执行，转而跳入catch大括号里执行，err形参接收的就是错误信息对象
          // 错误对象要用console.dir来打印
          try {
            // const res = await loginAPI(this.loginForm)
            // // console.log(res.data.data)
            // // console.log(res.data) // request里写了一次data，所以这里直接点一次data
            // this.$store.commit('user/SET_TOKEN', res.data) // 把token存到vuex里
            // 坑：不加await，会调用登录接口的时候，这个登录异步任务无结果的时候，代码会往下走就跳转进去了(可能密码错了也能跳转)
            // 用await暂停这个代码，让他在这里等着
            const res = await this.$store.dispatch('user/loginActions', this.loginForm) // 我不在登录页发请求了，我在action里发请求
            this.$message.success(res.message) // 后台返回的提示文字
            // this.$router.replace('/') // 等待成功以后，才会继续往下走
            // 问题：如何拿到刚才退出登录时，回传的未遂地址的路径字符串呢
            // 答案：this.$route.query(vue-router内会把?后面的参数字符串转成对象挂载到query属性上)
            // 打印一下route会看到redirect就是未遂地址的路径
            // ||前面有地址就跳转回未遂地址页面，如果前面没有(证明是第一次登录，就用后面的值跳转去首页)
            this.$router.replace(this.$route.query.redirect || '/')
          } catch (err) {
            console.dir(err)
            // this.$message.error('用户名或密码错误')
          }
          // eslint-disable-next-line no-empty
        } else {
        }
      })
    }
    // 测试接口
    // async btnFn() {
    //   const res = await getUserInfoAPI()
    //   console.log(res)
    // }
  }
}
</script>

<style lang="scss">
.login_btn {
  background: #407ffe;
  height: 64px;
  line-height: 32px;
  font-size: 24px;
}
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg: #283443;
$light_gray: #68b0fe; // 将输入框颜色改成蓝色
$cursor: #68b0fe; // 将输入框光标改成蓝色

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  background-image: url('~@/assets/common/login.jpg'); // 设置背景图片
  background-position: center; // 将图片位置设置为充满整个屏幕
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    // background: rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.7);
    border-radius: 5px;
    color: #454545;
  }
}
.el-form-item__error {
  font-size: 14px;
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;
  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
